J.R. Smith's Crazy Alley-oop

The Knicks continued to roll with a big win over the Spurs at Madison Square Garden on Thursday night, and J.R. Smith put quite the exclamation mark on the victory with this ridiculous alley-oop dunk.

Smith catches the ball around his midsection and appears to hover in midair before elevating and slamming it home.

Here's how it looked in GIF form: